KR20020011423A - Wipes and process of making - Google Patents

Abstract

A wipe product comprises a substrate and functional additive, preferably a high internal phase inverse emulsion, disposed in a discontinuous pattern on the substrate such that the pattern provides areas coated with the emulsion and areas free of the emulsion. When the product is wound into a roll, any two adjacent layers in the roll have their areas coated with the functional additive offset relative to each other. This improves water-retaining characteristics and roll compressibility characteristics of the product. Preferably, the functional additive of one layer is supported by the areas free of the functional additive of the adjacent layer. During the use, upon the application of pressure to the wipe, the emulsion locally expresses water useful for cleaning. The discontinuous pattern of the emulsion provides regions of the substrate which are wetted during use and regions which may remain dry. The wetted regions transfer water to the surface to be cleaned. The dry regions then remove the water from the surface for more efficacious cleaning.

Description

Wiping product and manufacturing method thereof {WIPES AND PROCESS OF MAKING}

Substrates with lotions and other coatings are well known in the art. Often, the lotion is softened by binding the lotion to the substrate. In addition, when the substrate is used as a facial tissue, for example, a lotion may be used to soften the skin. Examples of substrates containing lotions and useful in the field of facial tissues include, but are not limited to, US Pat. Nos. 4,426,418 (Patented: January 17, 1984, Patentee: Coleman et al.) And 4,481,243 (incorporated herein by reference). Patent Date: November 6, 1984, Patent Owner: Allen.

However, these attempts do not solve the problem of how to use lotions to enhance skin cleansing with tissue. Nor does it show how to clean other surfaces using lotion treated substrates.

Products such as wiping products have been developed. Certain wiping products have significant advantages over conventional cleaning products, particularly for removing soiling near the anus. Such wipe products include substrates (eg, non-woven or tissue) treated with a water-in lipid emulsion. In particular, when such a wiping product is provided in the form of a wet cleansing product used to remove feces near the anus, it is particularly beneficial for washing. Examples of such wiping products and preparations are U.S. Patent Nos. 5,863,663 (Patent Date: January 26, 1999, Patent Holder: Mackey et al.) And 5,827,909 (Patent Date: October 27, 1998, Patent Holder: DesMarais) Which are incorporated by reference herein. These wipes release large amounts of water during use, making the cleaning comfortable and more effective.

The lipid phase of the emulsion found in such wiping products can easily disintegrate even with small tensile contacts or pressures (eg, while wiping the skin) so that the internal water phase can be easily released. It is fragile to a degree, but strong enough even at high temperatures to melt the lipid phase to prevent the aqueous phase from being released earlier during the rigging of processing. In addition, in order to prevent the internal aqueous phase from evaporating much, the continuous lipid phase of the product is sufficiently stable during storage. Normal tensile strength and flushablilty of the product are not adversely affected by treatment with the high internal phase emulsion of the present invention. As a result, a user using such a product can perform comfortable and efficient wet cleaning without having to modify the usual cleaning habits. This technique can also be readily used for other purposes (eg, cleaning of hard surfaces, etc.).

If the emulsion is directly exposed to the surface to be cleaned, the cleaning process becomes easier. Such a wipe product may comprise a substrate in which an emulsion is distributed on one of the outwardly facing one or two exposed and exposed surfaces. However, disadvantages of this embodiment include the fact that the user will have a sticky feeling, the possibility of losing the emulsion from the surface and the difficulty of the process. In a preferred embodiment, the emulsion is distributed between two plies of the substrate to form a laminate.

Surprisingly, especially when it is desired to wash human skin, it has been found that the emulsion-continuous coating on the substrate does not wash most effectively. The discontinuous pattern of emulsion on the substrate provides a cleaning mechanism that is not known in the art. An “emulsion of discontinuous pattern” herein is a pattern having a substrate portion free of emulsion in the middle region of the substrate in which the emulsion is distributed.

Water is released from the emulsion during washing to remove dirt or dirt from the skin. Then, the skin areas moistened with water and dust or excreta are removed are wiped dry with an area free of emulsion. Similar advantages exist for cleaning other surfaces (eg, windows, counter tops, sinks, magnetic products and metal fixtures, walls, carpets or furniture, etc.) using the wipe products described above.

The mechanism by which moisture is transferred from the emulsion to the surface to be cleaned is carried out in several steps. First, moisture is released or expressed in the emulsion by the pressure pressed by the user. The pressure causes the emulsion to burst and release moisture. This moisture then saturates the substrate. When saturated, moisture penetrates the substrate in the Z direction. Moisture in excess of the local absorbent capacity of the substrate is transferred from the wipe product to the surface.

One possible way to solve the problem of providing sufficient amount of moisture to saturate the substrate and transfer moisture to the surface is to distribute an emulsion continuous layer on the substrate. The emulsion continuous layer may contain a greater amount of moisture than the emulsion discontinuous layer. This potential approach has several drawbacks. First, the thin emulsion continuous layer may not exceed the local capacity of the substrate. Second, excess lipid phase in the emulsion may accumulate, may not be well received by the user, and may lead to manufacturing difficulties. Third, if the amount of emulsion is too large, it may be difficult to burst the emulsion to release moisture. This difficulty is due to the large amount of lipid phase present. As the amount of lipid phase increases, the emulsion slides relatively rather than bursting. Fourth, the ratio of the surface area per volume differs from the optimal ratio. Finally, the manufacturing cost of the wipe product directly increases with the amount of emulsion.

Accordingly, the present invention provides a consumer product comprising a substrate and a functional additive (preferably a high internal phase emulsion) disposed on the substrate. In addition, the present invention provides a wipe product having a discrete emulsion coating on a substrate. In addition, the present invention provides a functional additive in a pattern that provides a functional additive (e.g., moisture released from the emulsion to the surface to be cleaned) with improved mobility and minimizes the loss of the functional additive due to evaporation when not in use. Eggplant provides a wiping product. In addition, the present invention provides functional additives of the type having improved water content properties and roll compressibility.

The present invention relates to cleaning products, in particular, to cleaning products in which a high internal phase inverse emulsion is distributed on the substrate.

1 is a schematic top plan view of a product according to the invention showing two roll positions.

2 is a schematic top plan view of an alternative embodiment of a product according to the invention, comprising a large pattern of functional additives defining a decorative label.

3 is a schematic top plan view of another embodiment according to the present invention showing a pattern in which the functional additive stripes are defined by spheres located side by side of the functional additive.

4 is a schematic top plan view of certain embodiments in accordance with the present invention showing functional additive stripes having a wave form.

4A is a schematic top plan view according to another aspect of the present invention showing functional additive stripes having discrete indented-shapes.

5 is a schematic perspective view with the side raised for a product according to the invention wound in roll form.

6 is a schematic perspective view of an article of the present invention comprising an individual sheet stack.

6A is a schematic side view of the sheet of the present invention with two layers and a functional additive located therebetween.

7 is a schematic perspective view of the process of the present invention.

8 is a schematic partial plan view of a process of the present invention using a web-control device.

Summary of the Invention

In the present invention, a plurality of disposable sheets is provided, which are superimposed successively in a manner facing each other. Among the plurality of sheets, each sheet comprises: a substrate; And a functional additive, extending from the substrate and disposed in a discontinuous pattern on the substrate, wherein the substrate has a first portion coated with the additive and a second portion without the additive. The sheets are laminated so that the first portions of the sheets adjacent to each other are offset to each other. Preferably, in all the adjacent pairs of sheets among the plurality of sheets, the first portion of one sheet substantially corresponds with the second portion of the other sheet.

The plurality of sheets described above may include rolls or stacks of individual sheets. Such sheets may, for example, be connected to one another along the perforation line, or may not be connected to each other.

In certain preferred embodiments, the functional additives described above are distributed in a pattern comprising stripes. Preferably, these stripes are generally parallel. Preferably, the strip is generally cylindrical in shape.

Preferably, the functional additives described above are softeners, emulsions, emollients, lotions, topical agents, soaps, antimicrobial and antibacterial agents, wetting agents, coatings, inks and dyes, strength additives, absorption additives, Binders, opacifying agents, fillers and combinations thereof. In certain preferred embodiments, the aforementioned functional additives include emulsions and liquids contained within the emulsion, and most preferably comprise a high internal phase inverse emulsion.

Preferably, the substrate comprises a cellulose structure. The substrate may be a one-layer structure or a multilayer structure. If the substrate comprises a laminate formed of two or more layers, the functional additive is preferably disposed between the two layers. The substrate may comprise a conventional uniform paper through through-air-dried paper, differential density paper or differential-basis weight paper. .

The wipe product of the present invention comprising a substrate and a functional additive disposed on the substrate has a machine direction and a cross-machine direction perpendicular to it. The stripes and machine direction form an acute angle to each other so that when the wipe product is wound with a roll having a rotation axis parallel to the cross machine direction, the stripes of all two adjacent layers of the wipe product are mutually different as described above. Offset in the cross machine direction. The maximum acute angle between the stripes and the machine direction is preferably from about 0.1 to about 10.0 degrees, more preferably from about 0.1 to about 2.0 degrees, most preferably from about 0.1 to about 1.5 degrees. Preferably, the functional additive stripes have a waving configuration. The functional additive stripes may be formed by discrete deposits that are placed side by side to form stripes.

The process of making the wipe product comprises the steps of: providing a substrate having a machine direction and a cross-machine direction perpendicular thereto; Providing a functional additive; Stacking the functional additive on the substrate in a pre-selected pattern to form a first plurality of substrate sites coated with the functional additive and a second plurality of substrate sites free of the functional additive. step; And winding the substrate with the functional additive on top in a roll such that basically the first portions of all two adjacent layers of such a roll are offset from each other.

Preferably, laminating the functional additive on the substrate comprises: moving one of the substrate and the functional additive at least in the machine direction relative to the other; And laminating the functional additive on a plurality of striped substrates such that the stripes and machine direction are at an acute angle with each other. More preferably, the step of laminating the functional additive on the substrate comprises moving the substrate in the machine direction and the emulsion in the cross-machine direction to form a plurality of stripes of the functional additive having a wave form. It further comprises a step.

details

The product (8) disclosed herein can be used for several purposes. For example, it may be used as a facial tissue, a bath tissue, a paper towel, a baby wipe product, an adult wipe product, a hard surface cleaning product, or the like. The intended use of the product does not limit the final product. The products according to the invention are also described herein as "wipe" which do not limit the intended use.

5 and 6, the article 8 of the present invention comprises a plurality of disposable sheets 20 stacked in succession in a face-to-face relationship. The sheet 20 may include a single layer or a multilayer structure. Each sheet 20 includes a substrate 10 and a functional additive 12 (preferably arranged in a discontinuous pattern) disposed on the substrate 10. Since the functional additive 12 is preferably disposed on the substrate 10 in a discontinuous pattern, the substrate 10 is a first portion coated with the functional additive (simply described as "12" in some figures). And a second portion 14 free of functional additives. The plurality of sheets described above may include rolls of individual sheets (FIG. 5) or stacks (FIG. 6). According to the present invention, in the plurality of sheets, the sheets 20 are stacked in a manner facing each other so that the first portions of the sheets lying next to each other are offset from each other. The two sheets are here placed side by side in mutually opposite manner and at least partially in contact with each other (mutually juxtaposed, see FIGS. 5 and 6). In the roll product of the present invention shown in FIG. 5 and the stack product of the present invention shown in FIG. 6, two sheets lying next to each other are described as 20a and 20b. A further advantage of the present invention arises when the functional additive extends outwardly from one of the substrate surfaces and / or when the functional additive causes at least a portion of one layer of the substrate to extend outward in the Z direction (FIG. 6). And 6A). The Z direction thickness (or height) H (see FIG. 5) of the preferred functional additive, including the emulsion and the liquid contained therein, is preferably from about 0.005 to about 0.100 inches, more preferably from about 0.010 to about 0.075 inches And most preferably about 0.025 to about 0.050 inches.

temperament

Referring to FIG. 1, the article 8 of the present invention comprises a substrate 10 and a functional additive 12 disposed on the substrate. Substrate 10 may be cellulose (especially tissue), non-woven, foam, or a combination thereof. The substrate may comprise existing homogeneous paper and structured differential density paper and / or differential basis weight paper. Suitable cellulose substrates 10 include, but are not limited to, US Pat. No. 5,245,025 (Trokhan et al., Patent Application-September 14, 1993); No. 5,503,715 (Trokhan et al., Patent Date-April 2, 1996); 5,534,326 (Trokhan et al., Patent Date-July 9, 1996); No. 4,637,859 (Trokhan et al., Patent Date-January 20, 1987); 4,514,345 (Johnson et al., Patent date-April 30, 1985); No. 4,529,480 (Trokhan et al., Patent Date-July 16, 1985); 5,328,565 (Rasch et al., July 12, 1994); No. 4,191,609 (Trokhan et al., Patent Date-March 4, 1980); 4,300,981 (Carstens, Nov. 17, 1981); 4,513,051 (Lavash, April 23, 1985); No. 4,637,859 (Trokhan et al., Patent Date-January 20, 1987); No. 5,143,776 (Givens, dated September 1, 1992); 5,637,194 (Ampulski et al., Patent date-July 10, 1997); No. 5,609,725 (Phan, issued March 11, 1997); And 5,628,876 (Ayers et al., Grant date-May 13, 1997), all of which are incorporated herein by reference.

The basis weight of the suitable tissue substrate 10 is about 7 to 25 pounds / 3000 square feet, preferably about 8 to 10 pounds / 3000 square feet, most preferably about 8- 1/2 pound / 3000 square feet (when used as a toilet tissue) and about 18-22 pounds / 3000 square feet (when used to clean hard surfaces). Multi-basis weight substrate 10 can be used in the present invention. The multi-weighing substrate 10 has a large basis weight portion and a small basis weight portion lying next to each other, and may optionally have an intermediate basis weight portion. Large basis weight areas provide strength. A small basis weight site transfers moisture released from the emulsion to the surface. When degenerate, the small basis weight region may be an aperture to increase the amount of moisture that is transferred to the surface. When using the multi-base weight substrate 10, a substrate 10 having a macro basis weight, averaging a large basis weight and a small basis weight region, or a large basis weight, a middle basis weight and a small basis weight region is contemplated.

Papermaking belts from which the substrate 10 is made may be prepared as described in the following literature: US Pat. No. 4,514,345 (Johnson et al., April 30, 1985); 4,528,239 (Trokhan et al., Patent date-July 9, 1985); 5,098,522 (Patent Date-March 24, 1992); No. 5,260,171 (Smurkoski et al., Patent grant-November 9, 1993); No. 5,275,700 (Trokhan et al., Patent grant-January 4, 1994); 5,328,565 (Rasch et al., July 12, 1994); No. 5,334,289 (Trokhan et al., Patent grant-August 2, 1994); 5,431,786 (Rasch et al., July 11, 1995); 5,496,624 (Stellijes Jr. et al., Patent Date-March 5, 1996); No. 5,500,277 (Trokhan et al., Patent Date-March 19, 1996); 5,514,523 (Trokhan et al., Patent Date-May 7, 1996); No. 5,554,467 (Trokhan et al., Patent Date-September 10, 1996); 5,566,724 (Trokhan et al., Patent Date-October 22, 1996); No. 5,624,790 (Trokhan et al., Patent Application-April 29, 1997); 5,628,876 (Ayers et al., Patent date-May 13, 1997); 5,679,222 (Rasch et al., Patent grant-October 21, 1997); And 5,714,041 (Ayers et al., Grant date-February 3, 1998) {these documents are all incorporated herein by reference}.

In addition, the papermaking belts used in the present invention may be prepared according to the methods described in the following documents: US Pat. No. 5,614,061 (Phan et al., Patent grant-March 25, 1997); No. 5,804,281 (Phan et al., Patent date-September 8, 1998); And 5,820,730 (Phan et al., October 13, 1998), all of which are incorporated herein by reference.

Substrate 10 may have two major sites. The first portion may comprise a portion imprinted with respect to the framework 81 of the belt. Preferably, the imprinted site comprises essentially a continuous network. A continuous network of first portions of the paper is produced on a basically continuous framework of the papermaking belt, and generally conforms to it geometrically and is located very close to it during the papermaking process.

The second portion of the substrate may comprise a plurality of domes distributed through the imprinted network portion. In general, such a dome conforms to a deflection conduit in the belt, geometrically and in position during the papermaking process. The dome conforms to the deflection conduit during the papermaking process, thereby essentially a continuous network of paper. Protrude outward from the site. By matching the deflection conduit during the papermaking process, the fibers in the dome are deflected in the Z direction between the web-facing surface of the framework and the web-facing side of the reinforcement structure. Preferably, the dome is discrete.

Without wishing to be bound by theory, the Applicant believed that the essentially continuous network portions and domes of the paper will generally have an equivalent basis weight. By deflecting the dome towards the deflection conduit, the density of the dome is reduced relative to the density of the essentially continuous network portion. In addition, the basically continuous network portion (or other pattern that can be selected) can later be imprinted on, for example, a Yankee drying drum. This imprint increases the density of the essentially continuous network portion relative to the density of the dome. Later, the paper thus obtained can be embossed in a known manner.

Paper according to the invention can be prepared as described in the following literature: US Pat. No. 4,529,480 (Trokhan et al., Patent Date-July 16, 1985); No. 4,637,859 (Trokhan et al., Patent Date-January 20, 1987); No. 5,364,504 (Smurkoski et al., Patent grant-Nov. 15, 1994); No. 5,529,664 (Trokhan et al., Patent Date-June 25, 1996); And 5,679,222 (Rasch et al., Patent date-October 21, 1997) {these documents are all incorporated herein by reference}.

If desired, the substrate may be dried and prepared on a through-air drying belt that does not have a patterned framework. The paper has discrete high density sites and basically continuous low density networks. During or after drying, differential (vacuum) pressure is applied to the substrate to increase its thickness and de-densify the selected sites. The paper and bonded belts can be made according to the following patents: US Pat. No. 3,301,746 (Sanford et al., Grant date-January 31, 1967); 3,905,863 (Ayers, patent date-September 16, 1975); 3,974,025 (Ayers, patent date-August 10, 1976); 4,191,609 (Trokhan, issued March 4, 1980); No. 4,239,065 (Trokhan, dated Dec. 16, 1980); 5,366,785 (Sawdai, patent date-November 22, 1994) and 5,520,778 (Sawdai, patent date-May 28, 1996) {all of which are incorporated herein by reference}.

In another aspect, the reinforcing structure described above may comprise felt or pressure felt as used in existing papermaking methods without through-air drying. The framework can be applied to felt-reinforced structures as described in the following literature: US Pat. No. 5,549,790 (Phan, Patent Date-August 27, 1996); No. 5,556,509 (Trokhan, dated Sep. 17, 1996); No. 5,580,423 (Ampulski et al., Patent Application-December 3, 1996); No. 5,609,725 (Phan, issued March 11, 1997); No. 5,629,052 (Trokhan et al., Patent Date-May 13, 1997); 5,637,194 (Ampulski et al., Patent date-July 10, 1997); No. 5,674,663 (McFarland et al., Patent grant-October 7, 1997); 5,693,187 (Ampulski et al., Patent Application-December 2, 1997); No. 5,709,775 (Trokhan et al., Patent date-January 20, 1998); No. 5,795,440 (Ampulski et al., Patent date-August 18, 1998); No. 5,814,190 (Phan, Patent Date-September 29, 1998); No. 5,817,377 (Trokhan et al., Patent Date-October 6, 1998); And 5,846,379 (Ampulski et al., Patent Date-December 8, 1998) {all of which are incorporated herein by reference}.

The paper may also be foreshortened, as is well known in the art. The paper can be reduced by creping from a hard surface (preferably a cylinder). Yankee drying drums are commonly used for this. Creping is performed using a doctor blade that is well known in the art. Creping may be performed as described in US Pat. No. 4,919,756 (Sawdai, Patent Application-April 24, 1992). Alternatively or in addition, it may be reduced through wet microcontraction as described in US Pat. No. 4,440,597 (Wells et al., Apr. 3, 1984).

If multi-weight substrates 10 are preferred, such substrates 10 can be prepared as described in the following patents: US Pat. No. 5,277,761 (Phan et al., Patent Application-January 11, 1994); No. 5,443,691 (Phan et al., Patent grant-August 22, 1995); And 5,614,061 (Phan et al., Grant date-March 25, 1997) {these documents are all incorporated herein by reference}. If multi-weight substrates 10 having radially deflected fibers are desired, such substrates 10 may be prepared as described in the following patents: US Pat. No. 5,245,025 (Trokhan et al., Patent Application-1993 14 September); No. 5,503,715 (Trokhan et al., Patent Date-April 2, 1996); No. 5,527,428 (Trokhan et al., Grant date-June 18, 1996) or 5,534,326 (Trokhan et al., Grant date-July 9, 1996) {These documents are all incorporated herein by reference. }.

If more durable or non-woven substrates 10 are to be used for wiping products 8, such substrates 10 may be prepared as described in the following patents: US Pat. No. 4,097,965 to Gotchel et al. , Patent Date-July 4, 1978); 4,130,915 (Gotchel et al., Patent grant-December 26, 1978); 4,296,161 (Kaiser et al., Patent Application-October 20, 1981); And 4,682,942 (Gotchel et al., Patent date-July 28, 1987) {all of which are incorporated herein by reference}.

Functional additives

The term "functional additive" (and variations thereof) herein means a substance that can be added to the paper to improve the functional properties (eg, ductility, strength and absorbency) of the wipe product of the present invention. In addition, the functional additive may be added to provide additional benefits. For example, the addition of lotions to the tissues provides the advantage that the tissues are moisturized at the time of use, resulting in better skin cleaning. Examples of various additives that may be used in the present invention include softeners, emulsions, emollients, lotions, topical medications, soaps, antimicrobial and antibacterial agents, wetting agents, coating agents, ink and dyes, strength additives, Absorbent additives, binders, opacifying agents, fillers and combinations thereof.

Depending on the particular process, the functional additive may be added to the papermaking fibers during the forming of the paper web described above, and / or by introducing the functional additive to one or two surfaces of the web after the web is generally formed. . When introducing functional additives such as softeners or lotions into one or more surfaces of the web, it may be desirable to introduce the functional additives so that they remain on the surface of the web and do not penetrate through the layers of the web.

As long as they are mutually compatible and do not significantly adversely affect the softness or strength properties of the wiping products of the present invention, various materials may be added to the aqueous papermaking paper to impart other desired properties to the wiping products of the present invention or to improve the papermaking process. It can be added to an aqueous papermaking furnish or to an embryonic web. The materials described below include, but are not limited to. Other materials may be included as long as they do not interfere with or interfere with the advantages of the present invention.

In order to control the zeta potential of the aqueous papermaking apparatus, a positive ionic biasing species delivered to the papermaking process is typically added. These materials are used because most solids in nature, including most inorganic fillers, fine and cellulose fiber surfaces, have a surface charge of (-). The cationic biasing species used traditionally is alum. More recently, charge biasing is preferably employed using relatively low molecular weight cationic synthetic polymers having a molecular weight of preferably about 500,000 or less (more preferably about 200,000 or less or about 100,000 or less). Perform. The load density of such low molecular weight cationic synthetic polymers is relatively high. This load density is about 4 to about 8 equivalents of cationic nitrogen / polymer (kg). Examples of such materials include Cytec, Inc. Cypro 514 from Stanford, CT There is. The use of such materials is clearly allowed within the practice of the present invention.

The use of fine particles with large surface areas and high anionic loads to improve molding, drainage, strength and retention is disclosed in the art. See, for example, US Pat. No. 5,221,435 to Smith. , Patent Application-June 22, 1993 (incorporated herein by reference)} Materials commonly used for this are silica colloids or bentonite clays The use of such materials is clearly within the scope of the invention.

If permanent wet strength is desired, the following compounds can be added to the papermaking apparatus or immature web: polyamide-epichlorohydrin, polyacrylamide, styrene-butadiene latiss, insoluble polyvinyl alcohol, urea-formaldehyde , Polyethyleneimine, chitosan polymers and mixtures thereof. Preferred resins such as polyamide-epichlorohydrin resins are cationic wet strength resins. Suitable types of resins of these resins are described in US Pat. Nos. 3,700,623 (Keim, dated Oct. 24, 1972) and 3,772,076 (Keim, dated Nov. 13, 1973). Commercial manufacturers of useful polyamide-epichlorohydrin resins include Hercules, Inc. (Wilmington, Delaware, trade name Kymene 557H). There is).

Many types of paper products have a limited strength when wet, because the paper products must be discharged through the toilet to the bowel or sewer system. When the boil product has wet strength, it is desirable to have a temporary fugitive wet strength, which is characterized by the loss of some or all of the original strength in the presence of moisture. If temporary wet strength is desired, the following binding materials can be selected: dialdehyde starch or other resins having an aldehyde function {eg, Co-Bond 1000 (ME, provided by National Starch and Chemical Company, Scarborough); Parez 750 (CT, Cytec, Stamford); And resins described in US Pat. No. 4,981,557 (Bjorkquist, patent date-Jan. 1, 1991); And other resins having decay properties as is well known in the art.

If enhanced absorbency is required, the tissue paper of the present invention may be treated with a surfactant. When using a surfactant, the amount used is preferably about 0.01 to about 2.0% by weight (based on the dry fiber weight of the tissue web). Preferably, the surfactant has an alkyl chain having 8 or more carbon atoms. Examples of anionic surfactants include linear alkyl sulfonates and alkylbenzene sulfonates. Examples of non-ionic surfactants include alkylglycosides including alkylglycoside esters (e.g. Crodesta SL-40, available from Croda, Inc., NY). ), Alkylglycoside ethers (eg, US Pat. No. 4,011,389 to Langdon et al., Issued March 8, 1977), and alkylpolyethoxylated esters (eg, CT, Greenwich) Pegosperse 200ML, available from Glyco Chemicals, Inc., and IGEPAL RC-520, available from Rhone Poulenc Cor., Cranbury, NJ. There is).

While the core of the present invention is the distribution of wet lotions on the tissue web surface or between layers of the tissue web, the present invention also includes modifications in which functional additives are added as part of the papermaking process. For example, chemical emollients can be included through wet end addition.

Filling materials may also be incorporated into the tissue paper of the present invention. US Pat. No. 5,611,890 (Vinson et al., Grant date-March 18, 1997) discloses a filled tissue paper product that can be used as a substrate of the present invention.

The optional functional additives described above are for illustrative purposes and do not limit the scope of the present invention.

Preferred functional additives 12 of the present invention include emulsions. The following description of the functional additive 12 mainly means an emulsion as a preferred embodiment of the present invention, but the present invention is not limited to the emulsion, and various types of functional additives described herein can be used.

Preferably the emulsion 12 comprises an emulsifier of a continuous solidified lipid phase that forms an emulsion when the lipid phase is a fluid and an internal polar phase distributed over the lipid phase. Such emulsions break when in use (eg when wiping skin or other surfaces) when low shear forces are imposed and release the polar phases therein.

External Lipid Phase

The continuous solidified lipid phase described above provides the stabilizing structure essential for the high internal phase inverse emulsion 12 of the present invention. In particular, this continuous lipid phase prevents the distributed internal phase from being released before use (eg, during storage).

The continuous lipid phase may comprise from about 2 to about 60% of the emulsion (12) of the present invention. Preferably, this continuous lipid phase comprises about 5 to about 30% of the emulsion (12). Most preferably, this continuous lipid phase comprises about 6 to about 15% of the emulsion (12).

The main constituent of this continuous lipid phase is the wax lipid material. The characteristic of these lipid substances is that they are solid at ambient temperature since their melting point is about 30 ° C. or higher. Preferably, the melting point of the lipid material is at least about 50 ° C. Typically the melting point of the lipid material is from about 40 to about 80 ° C, more typically from about 50 to about 70 ° C.

Although this waxy lipid material is solid at ambient temperature, it must be fluid or plastic at the temperature at which the high internal phase inverse emulsion 12 described above is administered to the carrier. In addition, even if such lipid substances are fluids or plastics at the temperature at which the emulsion 12 is administered to the carrier substrate 10 described above, the high temperatures typically encountered during the storage and distribution process of the products of the present invention (eg, It is desirable to be somewhat stable (ie minimal fusion of emulsion 12 microparticles) for a long time at about 50 ° C. or more). In addition, such lipid material must be sufficiently destroyed under shear conditions in use of the product to release a polar phase distributed therein. In addition, such lipid materials are preferred to give a good skin feel when used in personal care products (eg, wet-like wash wipe products 8 and tissues used for near anus cleaning).

Wax lipid materials suitable for use in the high internal phase inverse emulsion 12 of the present invention include natural and synthetic waxes and other oil-soluble materials having wax firmness. The term “wax” herein refers to an organic compound or compound that is generally water-insoluble and tends to exist as an amorphous or microcrystalline or crystalline solid at ambient temperature (eg, about 25 ° C.). Suitable waxes include various types of hydrocarbons and esters of certain fatty acids and fatty alcohols. It may be derived from natural sources (ie, animals, plants or minerals) and may be synthesized. In addition, various wax mixtures may be used.

Some representative animal and vegetable waxes that may be used in the present invention include beeswax, carnauba, spermaceti, lanolin, shellac wax, candelilla, and the like. Included. Particularly preferred animal and vegetable waxes are beeswax, lanolin and candelilla. Representative mineral waxes that can be used in the present invention include petroleum-based waxes (eg, paraffins, petrolatum and microcrystalline waxes) and fossil or soil waxes (eg, white ceresin waxes, yellow ceresin waxes, white ozone). Kerry wax and the like). Particularly preferred mineral waxes are petrolatum, microcrystalline wax, yellow cerasin wax and white ozokerite wax. Representative synthetic waxes that can be used in the present invention include ethylene polymers (eg, polyethylene wax), naphthalene chloride (eg, "Halowax"), hydrocarbon-type waxes produced by Fischer-Tropsch synthesis, and the like. Particularly preferred synthetic waxes are polyethylene waxes.

In addition to the wax lipid material, the continuous lipid phase described above may include small amounts of other lipophilic or lipid-mixable materials. Such other lipophilic / lipid-mixable materials are typically included to stabilize the emulsion 12 to minimize the loss of internal superfines to enhance the feel of the emulsion 12 on the skin. Suitable materials of this type that may be present in the continuous lipid phase described above include hot melt adhesives (eg, Findley 193-336 resin), long chain alcohols (eg, cetyl alcohol, stearyl alcohol and cetaryl alcohol). , Water-insoluble soaps (eg aluminum stearate), silicone polymers (eg polydimethylsiloxane), hydrophobically-modified silicone polymers (eg phenyl trimethicone) and the like. Other suitable lipophilic / lipid-mixable materials include polyol polyesters. The term "polyol polyester" means a polyol having four or more ester groups. The term "polyol" means a polyhydric alcohol having at least 4 (preferably 4 to 12, most preferably 6 to 8) hydroxy groups. Polyols include monosaccharides, disaccharides and trisaccharides, sugar alcohols and other sugar derivatives (eg alkyl glycosides), polyglycerols (eg diglycerols and triglycerols), pentaerythritol And polyvinyl alcohol. Preferred polyols include xylose, arabinose, ribose, xylitol, erythritol, glucose, methyl glucoside, mannose, galactose, fructose, sorbitol, maltose, lactose, sucrose, raffinose and maltotriose. Included. Sucrose is a particularly preferred polyol. In polyol polyesters useful in the present invention, not all hydroxy groups of the polyol need to be esterified, but disaccharide polyesters have 3 or less (more preferably 2 or less) non-esterified hydroxy groups Should have Typically, substantially all (eg, at least about 85%) hydroxy groups of the polyol are esterified. In the case of sucrose polyesters, about 7 to 8 hydroxy groups of the polyol are usually esterified.

The term "liquid polyol polyester" refers to a group of polyol polyesters having fluid consistency at about 37 ° C. or less. The term "solid polyol polyester" means a group of polyol polyesters having plastic or solid firmness at least about 37 ° C. Liquid polyol polyesters and solid polyol polyesters can be successfully used as emollient and immobilizing agents in the emulsion 12 of the present invention, respectively. In certain cases, solid polyol polyesters may also provide certain emollient functions.

2. Internal Polar Phase

Typically, the main component of the high internal phase inverse emulsion 12 of the present invention is a dispersed internal superfine.

In a preferred embodiment, the superfine contains large amounts of water, preferably at least about 60% by weight, more preferably at least about 75% by weight, more preferably at least about 90% by weight of the emulsion (12).

Such internal superfines can provide many advantages when emitted. For example, in a wet-like wash wipe product 8 used for washing near the anus when the inner superfine is water, the inner superfine is the released moisture having the main washing activity.

In a preferred embodiment of the invention, the internal superfine (preferably comprising water as the main component) comprises an antimicrobial compound (preferably an essential oil or active oil thereof) and a bleach (preferably a peroxygen bleach). Is sterile superfine. Sterile wipe products 8 comprising these sterile internal superfines are safe while exhibiting effective sterilization performance on the surface to be treated.

The term "effective sterilization performance" means that the number of bacteria on the infected surface is greatly reduced due to the sterile wipe product 8 of the present invention. In fact, it contains Gram-positive bacteria (eg Staphylococcus aureus) and Gram-negative bacteria (eg Pseudomonas aeruginosa) and more resistant microorganisms (eg, fungi such as Candida albicans) present on infected surfaces. Various microorganisms can be effectively sterilized.

In addition, an advantage other than the sterilization properties of the sterile wipe product 8 according to the present invention is that it can bring about an excellent cleaning effect by additionally including a surfactant and / or a solvent on the sterile pole described above.

Preferred internal sterile superfine essential ingredients are antimicrobial compounds commonly selected from the group consisting of essential oils or active forms thereof, parabens (eg methyl parabens, ethyl parabens), glutaraldehyde and mixtures thereof. Essential oils or their actives are preferred.

Suitable essential oils or actives thereof used in the present invention are essential oils having antimicrobial activity (more preferably, antimicrobial activity). The term "active oil of essential oil" means all components of essential oils having antimicrobial / antibacterial activity. Another advantage of the aforementioned essential oils and their actives is that they can add a fragrant odor without the need to add perfume to the sterile wipes product 8 of the present invention. In fact, the sterile wipe product 8 according to the invention provides good sterilization performance and good smell on the infected surface.

These essential oils include musk, lemongrass, citrus fruits, lemons, oranges, anise, clove, aniseed, cinnamon, geranium, rose, mint, lavender, sheet Ronella, eucalyptus, peppermint, camphor, sandalwood and cedar and mixtures thereof. Active agents of the essential oils used in the present invention include thymol (e.g. in musk), eugenol (e.g. in cinnamon and clove), menthol (e.g. in mint), agent Raniol (eg in geranium and roses), berbenone (eg in verbain), eucalyptol and pinocarbon (in eucalyptus), cedrol (eg in cedar ), Anetol (eg, present in anise), carbacroll, hinokithiol, burberry, terpineol, limonene, methyl salicylate and mixtures thereof. Preferred actives of the essential oils used in the present invention are thymol, eugenol, verbenone, eucalyptol, carbacrol, limonene and / or geraniol. Thymol is commercially available from Aldrich, for example, and eugenol is, for example, Sigma, Systems-Bioindustries (SBI) -Manheimer Inc. Marketed by.

Typically, the antimicrobial compound or mixture thereof is present in the internal superfine at 0.001 to 5% by weight (preferably 0.001 to 3% by weight, more preferably 0.005 to 1%) based on the total internal superfine weight do.

The main component of the above internal sterile superfine is bleach or a mixture thereof. All known bleaches, including chlorine bleach and peroxygen bleach, are suitable for use. The presence of a bleach (preferably peroxygen bleach) in the sterile wipe product 8 of the invention adds sterile properties to the wipe product 8.

Chlorine bleach suitable for use in the present invention includes all compounds capable of releasing chlorine upon contact with water. Suitable chlorine bleaches include alkali metal dichloroisocyanurates and alkali metal hypohalites (eg hypochlorite and / or hypobromite). Preferred chlorine bleach is alkali metal hypochlorite. Various forms of alkali metal hypochlorite are commercially available, such as sodium hypochlorite.

Preferred bleaches for use in the present invention are peroxygen bleaches (more preferably hydrogen peroxide or a water soluble source or mixture thereof). Hydrogen peroxide is particularly preferred.

Peroxygen bleaches, such as hydrogen peroxide, are generally preferred because they are also environmentally acceptable. For example, hydrogen peroxide decomposition products are oxygen and water.

By "hydrogen peroxide source" is meant herein all compounds which produce perhydroxy ions upon contact with water. Suitable water-soluble sources of hydrogen peroxide used in the present invention include percarbonates, persilicates, persulfates (e.g. monopersulfates), perborates, peroxy acids (e.g. diperoxydodecanedioic acid (DPDA)). ), Magnesium perphthalic acid, dialkylperoxide, diacylperoxide, performed percarboxylic acid, organic and inorganic peroxides and / or hydroperoxides and mixtures thereof.

Typically, the amount of bleach and mixtures thereof is from 0.001 to 15% by weight (based on the total amount of internal superfine), preferably from 0.001 to 5% by weight, more preferably from 0.005 to 2% by weight.

Said internal sterile superfine may further comprise a cleaning surfactant or mixtures thereof. Typically, the amount of such surfactants or mixtures thereof is from 0.001 to 40% by weight (based on the total amount of internal superfines), preferably from 0.01 to 10% by weight, more preferably from 0.05 to 2% by weight.

Suitable cleaning surfactants used in the present invention include non-ionic, anionic, cationic, amphoteric and / or zwitterionic surfactants well known in the art. Preferred washing surfactants are amphoteric and / or zwitterionic surfactants.

Suitable zwitterioinic surfactants suitable for use in the present invention include:^OneR²R³NO {where R^One, R²And R³Are each independently a saturated, substituted or non-substituted, linear or branched hydrocarbon chain} containing 1 to 30 carbon atoms. Preferred amine oxide surfactants for use in the present invention are those of formula R^OneR²R³NO {where R^OneIs a hydrocarbon chain having 1 to 30 carbon atoms (preferably 6 to 20, more preferably 8 to 16, most preferably 8 to 12); R²And R³Are each independently substituted or unsubstituted, straight or branched chain hydrocarbon chains having 1 to 4 carbon atoms (preferably 1 to 3, more preferably methyl groups). R^OneMay be a saturated, substituted or non-substituted, linear or branched hydrocarbon chain. Suitable amine oxides for use in the present invention are, for example, C commercially available from Hoechst.₁₂-C₁₆Amine Oxide and Natural Blend C₈-C₁₀Amine oxides. Amine oxide is preferred in the present invention because amine oxide provides effective cleaning performance and adds the sterilization properties of sterile wipe products (8).

Zwitterionicsurfactants suitable for use in the present invention contain cationic and anionic hydrophilic groups in one molecule at a relatively wide range of pH. Other cationic groups such as phosphonium, imidazolinium and sulfonium groups can be used, but typically the cationic group used is a quaternary ammonium group. Sulfates, phosphonates and the like can be used, but commonly used anionic hydrophilic groups are carboxylates and sulfonates. General formula of the predetermined positive ionic surface active agent used in the present invention is ^{R 1 -N + (R 2)} (R 3) R 4 [X -] { wherein, R ¹ is an anaerobic group; R ² and R ³ are each C ₁ -C ₄ alkyl, hydroxy alkyl or other substituted alkyl group capable of combining with N to form a ring structure; R ⁴ is a moiety which binds the cationic nitrogen atom to the anaerobic group, and typically has an alkylene, hydroxy alkylene or polyalkoxy group having 1 to 10 carbon atoms; X is a hydrophilic group (preferably a carboxylate or sulfonate group)}. Preferred anaerobic groups R ¹ are alkyl groups containing 1 to 24 carbon atoms (preferably less than 18, more preferably less than 16). The anaerobic groups may contain unsaturated and / or substituents and / or bonding groups (eg, aryl groups, amido groups, ester groups, etc.). In general, for reasons of cost and stability, the simple alkyl groups described above are preferred.

Highly preferred zwitterionic surfactants include betaine and sulfobetaine surfactants, derivatives thereof and mixtures thereof. The betaines or sulfobetaine surfactants described above are preferred in the present invention because they help sterilize by increasing the cell wall permeability of the bacteria to allow other active ingredients to penetrate the bacterial cells.

In addition, due to the moderate activity profile of betaine or sulfobetaine described above, it is particularly suitable for cleaning delicate surfaces (eg, hard surfaces in contact with food and / or infants). In addition, betaine and sulfobetaine surfactants act very moderately on the skin and / or surface to be treated.

Betaines and sulfobetaines suitable for use in the present invention are betaine / sulfobetaines and betaine-like detergents, which contain both basic and acidic groups that form inner salts and thus have a broad pH range. To provide cationic and anionic hydrophilic groups. Examples of such surfactants are described in US Pat. Nos. 2,082,275, 2,702,279 and 2,255,082, each incorporated by reference. Preferred betaines and sulfobetaine surfactants are compounds of the formula: or compounds thereof:

Where

R ¹ is a hydrocarbon chain containing 1 to 24 carbon atoms (preferably 8 to 18, more preferably 12 to 14);

R ² and R ³ are each a hydrocarbon chain containing 1 to 3 (preferably 1) carbon atoms;

n is an integer of 1 to 10 (preferably an integer of 1 to 6, more preferably 1);

Y is selected from carboxyl or sulfonyl radicals;

The total of the R ¹ , R ² and R ³ hydrocarbon chains is 14 to 24 carbon atoms.

Examples of particularly suitable betaine surfactants include C12-C18 alkyl dimethyl betaine (eg coconut-betaine) and C10-C16 alkyl dimethyl betaine (eg laurylbetaine). Coconut-betain is a trade name Amonyl 265.RTM. Available as Seppic. Laurylbetaine is a trademark of Empigen BB / L.RTM. (Albright & Wilson).

Other specific zwitterionic surfactants have the following structural formula:

R ¹ -C (O) -N (R ² )-(C (R ³ ) ₂ ) n -N (R ² ) ₂ ⁽⁺⁾ -(C (R ³ ) ₂ ) n -SO ₃ ^(-) ; or

R ¹ -C (O) -N (R ² )-(C (R ³ ) ₂ ) nN (R ² ) ₂ ⁽⁺⁾ -(C (R ³ ) ₂ ) n-COO ^(-)

Where

Each R ¹ is a hydrocarbon {eg, an alkyl group containing up to 8 to 20 (preferably 18, more preferably 16) carbon atoms};

Each R ² is hydrogen (when attached to the amido nitrogen), short-chain alkyl or substituted alkyl having 1 to 4 carbon atoms {preferably methyl, ethyl, propyl, hydroxy-substituted ethyl or propyl Mixtures thereof (preferably methyl)};

Each R ³ is hydrogen or a hydroxy group;

Each n is 1 to 4 (preferably 2 to 3, more preferably 3);

There is not more than one hydroxy group at every (C (R ³ ) ₂ ) residue.

R ¹ groups may be branched and / or unsaturated. R ² groups may also be linked to form a ring structure. This type of surfactant is C10-C14 fatty acrylamidopropylene- (hydroxypropylene) sulfobetaine, which has the trade name "Varion CAS sulfobetaine.RTM." It is marketed as (Sherex Company).

Non-ionic surfactants suitable for use in the present invention are fatty alcohol ethoxylates and / or propoxylates, commercially available having various fatty alcohol chain lengths and varying degrees of ethoxylation. In fact, the HLB value of such alkoxylated non-ionic surfactants basically depends on the length of the fatty alcohol chain, the nature of the alkoxylation and the degree of alkoxylation. A surfactant catalog is available which describes a number of surfactants, including non-ionic surfactants and their HLB values.

Particularly suitable for use in the present invention as non-ionic surfactants are hydrophobic non-ionic surfactants having an HLB (hydrophilic-lipophilic balance) of less than 16 (more preferably less than 15). Such hydrophobic non-ionic surfactants are known to have excellent grease cutting properties.

Preferred non-ionic surfactants for use in the present invention are those of the formula RO- (C ₂ H ₄ O) _n (C ₃ H ₆ O) _m H {where R is a C6 to C22 alkyl chain or a C6 to C28 alkyl benzene impression; n + m is 1-20, n is 1-15, m is 0-20 (preferably n + m is 1-15, n and m 0.5-15; more preferably n + m is 1-10, n and m 0 to 10)}. Preferred R chains for use in the present invention are C8 to C22 alkyl chains. Accordingly, suitable hydrophobic non-ionic surfactants for use in the present invention include Dobanol R91-2.5 (HLB = 8.1; R is a mixture of C9 and C11 alkyl chains; n is 2.5 and m is 0), Lutensol R TO3 ( HLB = 8; R is C13 alkyl chain; n is 3 and m is 0), Lutensol R AO3 (HLB = 8; R is a mixture of C13 and C15 alkyl chains; n is 3 and m is 0), Tergitol R 25L3 ( HLB = 7.7; R is a C12 to C15 alkyl chain; n is 3 and m is 0), Dobanol R23-3 (HLB = 8.1; R is a mixture of C12 and C13 alkyl chains; n is 3 and m is 0), Dobanol R23-2 (HLB = 6.2; R is a mixture of C12 and C13 alkyl chains; n is 2 and m is 0), Dobanol R45-7 (HLB = 11.6; R is a mixture of C14 and C15 alkyl chains; n is 7 and m is 0), Dobanol R23-6.5 (HLB = 11.9; R is a mixture of C12 and C13 alkyl chains; n is 6.5 and m is 0), Dobanol R25-7 (HLB = 12; R is a C12 and C15 alkyl chain Mixture; n is 7 and m is 0), Dobanol R91-5 (HLB = 11.6; R is a mixture of C9 and C11 alkyl chains; n is 5 and m is 0), Dobanol R91-6 (HLB = 12.5; R is A mixture of C9 and C11 alkyl chains; n is 6 and m is 0), Dobanol R91-8 (HLB = 13.7; R is a mixture of C9 and C11 alkyl chains; n is 8 and m is 0), Dobanol R91-10 (HLB = 14.2; R is C9 and C11 alkyl chains N is 10 and m is 0) or a mixture thereof. Preferred in the present invention are Dobanol R91-2.5, Lutensol R TO3, Lutensol R AO3, Tergitol R 25L3, Dobanol R 23-3, Dobanol 23-2, Dobanol R 23-10 or mixtures thereof. Dobanol R surfactants are commercially available from SHELL. Lutensol R surfactants are commercially available from BASF and Tergitol R surfactants are commercially available from UNION CARBIDE.

Suitable anionic surfactants for use in the present invention include structural ROSO ₃ M water soluble salts or acids wherein R is preferably C6 to C24 hydrocarbyl (preferably alkyl or hydroxy having a C8-C20 alkyl component). Alkyl, more preferably C8-C18 alkyl or hydroxyalkyl); M is hydrogen or cation [e.g. alkali metal cation (e.g. sodium, potassium, lithium) or ammonium to substituted ammonium (e.g. methyl-, dimethyl- and trimethyl ammonium cation and quaternary ammonium cation ( Tetramethyl-ammonium and dimethyl pipedinium cations and quaternary ammonium cations derived from alkyl amines such as ethylamine, diethylamine, triethylamine and mixtures thereof)].

Other anionic surfactants suitable for use in the present invention include alkyl-diphenyl-ether-sulfonates and alkyl-carboxylates. Other anionic surfactants include soap salts (including, for example, sodium salts, potassium salts, ammonium salts, and substituted ammonium salts such as mono-, di- and tri-ethanolamine salts), C9-C20 linear Alkylbenzenesulfonates, C8-C22 primary or secondary alkanesulfonates, C8-C24 olefinsulfonates, sulfonated polycarboxylic acids (produced by pyrrolineating alkaline earth metal citrate, as described in British Patent No. 1,082,179) Sulfonated polycarboxylic acid prepared by sulfonated product), C8-C24 alkylpolyglycoethersulfate (containing up to 10 moles of ethylene oxide), alkyl ester sulfonate (e.g., C14-C16 methyl ester sulfonate ), Acyl glycerol sulfonate, fatty oleyl glycerol sulfate, alkyl phenol ethylene oxide ether sulfate, paraffin sulfonate, alkyl phosphate, isethionate (e.g. Real isethionates), N-acyl taurates, alkyl succinates and sulfosuccinates, monoesters of sulfosuccinates (particularly saturated and unsaturated C12-C18 monoesters) and diesters (particularly saturated and unsaturated C6-C14 diesters), acyl sarcosinates, sulfates of alkylpolysaccharides (e.g. sulfates of alkylpolyglucosides-non-ionic non-sulfated compounds described below), side chain primary alkyl sulfates, Alkyl polyethoxy carboxylates {e.g., compounds of formula RO (CH ₂ CH ₂ O) _K CH ₂ COO-M +, wherein R is C8-C22 alkyl; K is an integer from 0 to 10; M is a soluble salt -Forming cation)}. Also suitable are resin acids and hydrogenated resin acids (eg, rosin, hydrogenated rosin, resin acids present and derived from tall oil and hydrogenated resin acids). Other examples are described in "Surface Active Agents and Detergents" (Vol. I and II, Schwartz, Perry and Berch). In addition, the various surfactants described above are described in U.S. Patent No. 3,929,678 (Patent Date: December 30, 1975, Patent Owner: Laughlin et al., Line 58 to column 29 to column 29). Line 23).

Preferred anionic surfactants for use in the present invention are alkyl benzene sulfonates, alkyl sulfates, alkyl alkoxylated-sulfates, paraffin sulfonates and mixtures thereof.

The internal sterile superfine pH according to the invention is 1 to 12 (preferably 3 to 10, more preferably 3 to 9). This pH can be adjusted using a basicizing or acidifying agent. Examples of basicizing agents include alkali metal hydroxides (eg potassium and / or sodium hydroxide) or alkali metal oxides (eg potassium and / or sodium oxide). Examples of acidifying agents are organic or inorganic acids such as citric acid or sulfuric acid.

A solvent may be present at the internal sterile peak according to the present invention. Such solvents have the advantage of improving the cleaning ability of the sterile wipe product 8 of the present invention. Suitable solvents for use in the present invention include propylene glycol derivatives (e.g. n-butoxypropanol or n-butoxypropoxypropanol), water soluble CARBITOL Solvent or water-soluble CELLOSOLVE Solvents are included. Water Soluble Carbitol The solvent is a compound of the class 2- (2-alkoxyethoxy) ethanol, wherein the alkoxy group is derived from ethyl, propyl or butyl. Preferred carbitol compounds are 2- (2-butoxyethoxy) ethanol, also known as butyl carbitol. Water Soluble CELLOSOLVE The solvent is a compound of the class 2-alkoxyethoxyethanol, with 2-butoxyethoxyethanol being preferred. Other suitable solvents include benzyl alcohol, methanol, ethanol, isopropyl alcohol and diols (eg 2-ethyl-1,3-hexanediol and 2,2,4-trimethyl-1,3-pentanediol) And mixtures thereof. Suitable solvents for use in the present invention are n-butoxypropoxypropanol, butyl CARBITOL , And mixtures thereof, most preferably butyl CARBITOL to be.

Internal sterile superfines in the present invention may be applied to other optional components (radical scavengers, chelating agents, thickening agents, builders, buffers, stabilizers, bleach activators, bowel suspensions, dye transfer agents, brighteners). ), Including anti-dust agents, enzymes, dispersants, dye transfer inhibitors, pigments, perfumes and dyes, and the like.

Suitable radical scavengers for use in the present invention include well known substituted mono- and dihydroxy benzenes and derivatives thereof, alkyl and aryl carboxylates, and mixtures thereof. Preferred radical scavengers include di-tertiary butyl hydroxy toluene (BHT), p-hydroxy-toluene, hydroquinone (HQ), di-tertiary butyl hydroquinone (DTBHQ), mono-tertiary butyl hydro Quinone (MTBHQ), tertiary butyl-hydroxy anisole, p-hydroxy-anisole, benzoic acid, 2,5-dihydroxy benzoic acid, 2,5-dihydroxyterephthalic acid, toluic acid, catechol, t- Butyl catechol, 4-allyl-catechol, 4-acetyl catechol, 2-methoxy-phenol, 2-ethoxy-phenol, 2-methoxy-4- (2-propenyl) phenol, 3,4- Dihydroxy benzaldehyde, 2,3-dihydroxy benzaldehyde, benzylamine, 1,1,3-tris (2-methyl-4-hydroxy-5-t-butylphenyl) butane, tertiary butyl-hydroxy- Aniline, p-hydroxy aniline, n-propyl-gallate. Very preferred for use in the present invention is di-tert-butyl hydroxy toluene, for example under the trade name IONOL CP. It is marketed as (SCHELL).

Typically, radical scavengers or mixtures thereof are present in the inner water phase at up to 5% by weight (preferably 0.001 to 3% by weight, more preferably 0.001 to 1.5% by weight).

Chelating agents suitable for use in the present invention include all chelating agents well known in the art (eg, phosphonate chelating agents, amino carboxylate chelating agents, or other carboxylate chelating agents, Multifunctional group-substituted aromatic chelating agents and mixtures thereof).

Examples of the phosphonate chelating agents include etidronic acid (1-hydroxyethylidene-bisphosphonic acid or HEDP) and amino phosphonate compounds [amino alkylene poly (alkylene phosphonates), alkali metals. Ethane 1-hydroxy diphosphonate, nitrilo trimethylene phosphonate, ethylene diamine tetra methylene phosphonate and diethylene triamine pentamethylene phosphonate. The phosphonate compounds described above may be in acidic form or present as salts with different cations in some or all acidic functional groups. Preferred phosphonate chelating agents are diethylene triamine penta methylene phosphonates. Such phosphonate chelating agents have the trade name DEQUEST It is marketed in (MONSANTO).

In addition, polyfunctionally-substituted aromatic chelating agents can be used (see US Patent No. 3,812,044 (Patent Date-May 21, 1974; Patent Holder-Conner et al.)). Preferred among these types of compounds in acid form are dihydroxydisulfobenzenes (eg 1,2-dihydroxy-3,5-disulfobenzene).

Preferred biodegradable chelating agents that can be used in the present invention are ethylene diamine N, N'-disuccinic acid, alkali metals, alkaline earth, ammonium or substituted ammonium salts or mixtures thereof. Ethylenediamine N, N'-disuccinic acid (particularly (S, S) isomers) is described in detail in US Pat. No. 4,704,233 (Patent Date-November 3, 1987; Patent Holders-Hartman and Perkins). For example, ethylenediamine N, N'-disuccinic acid is tradename ssEDDS (Palmer Research Laboratories).

Suitable amino carboxylate chelating agents for use in the present invention include ethylene diamine tetra acetate, diethylene triamine pentaacetate, diethylene triamine pentaacetate (DTPA), N-hydroxyethylethylenediamine triacetate, nitrilotri Acetates, ethylenediamine tetraproprionate, triethylenetetraaminehexa-acetate, ethanol diglycine, propylene diamine tetraacetic acid (PDTA) and methyl glycine di-acetic acid (MGDA), which include acid form, alkali metal, Ammonium and substituted ammonium salt forms. Particularly suitable are diethylene triamine pentaacetate (DTPA), propylene diamine tetraacetic acid (PDTA) (e.g. the trade name Trilon FS from BASF) Commercially available) and methyl glycine di-acetic acid (MGDA).

Still other carboxylate chelating agents used in the present invention include malonic acid, salicylic acid, glycine, aspartic acid, glutamic acid, dipicolinic acid and derivatives thereof, and mixtures thereof.

Typically, the chelating agents or mixtures thereof are present in the inner pole at 0.001 to 5% by weight (preferably 0.001 to 3% by weight, more preferably 0.001 to 1.5% by weight).

The sterile wipe product 8 according to the invention is suitable for sterilizing a variety of surfaces, including living surfaces (eg human skin) and non-living surfaces (including hard surfaces).

Regardless of the internal composition, the internal superfine preferably comprises about 67 to about 92% (most preferably about 82 to about 91%) of the emulsion 12.

When the inner superfine includes water as the main component, the inner superfine may comprise a water-soluble or dispersible material which does not adversely affect the stability of the high inner phase inverse emulsion 12. A material commonly included in the inner aqueous phase is a water-soluble electrolyte. The dissolved electrolyte minimizes the dissolution of substances present in the lipid phase into the water phase. Any electrolyte capable of imparting ionic strength to the aqueous phase can be used. Suitable electrolytes include water soluble monovalent, divalent or trivalent inorganic salts (eg, water soluble halides (eg chlorides), nitrates and sulfates of alkali metals and alkaline earth metals). Examples of such electrolytes include sodium chloride, calcium chloride, sodium sulfate, magnesium sulfate and sodium bicarbonate. Typically, the electrolyte is included at a concentration of about 1 to about 20% of the internal aqueous phase.

Other water soluble or dispersible materials that may be present on the inner pole include thickeners and viscosity modifiers. Suitable thickeners and viscosity modifiers include, but are not limited to, polyacrylic resins, hydrophobically-modified polyacrylic resins (e.g. Carbopol and Permulen), starches (e.g. corn starch, potato starch, tapioca), gums (e.g. Guar gum, gum arabic), cellulose ethers (eg hydroxypropyl cellulose, hydroxyethyl cellulose, carboxymethyl cellulose) and the like. Typically, such thickeners and viscosity modifiers are included at a concentration of about 0.05 to about 0.5% of the inner phase.

Further, when water is the main component of the inner superfine, water-soluble or dispersible materials that may be present in the inner phase include polyvalent cationic polymers that impart steric stability at the superfine-lipid contact surface, and emulsions (12) Non-ionic polymers are included to stabilize these compounds. Suitable polyvalent cationic polymers include Reten 201, Kymene 557H and Acco 711. Suitable non-ionic polymers include polyethylene glycol (PEG) such as Carbowax. Typically, such polyvalent cationic and non-ionic polymers are included at concentrations of about 0.1 to about 1.0% of the superfine.

3. Emulsifier

Another major component of the high internal phase inverse emulsion 12 of the present invention is an emulsifying agent. The emulsion 12 of the present invention contains an effective amount of an emulsifier. An "effective amount" depends on a number of factors, such as the amount of lipid and internal superfine constituent, the type of emulsifying agent used, the impurity present in the emulsifying agent, and the like. Typically, emulsion 12 comprises about 1 to about 10% (preferably about 3 to about 6%, most preferably about 4 to about 5%) of the emulsifying agent. Although emulsifying agents are described in the singular, one or more emulsifying agents can be used to form the emulsion (12). In fact, as described below, it may be desirable to use primary emulsifying and secondary emulsifying formulations when certain materials are used. When using two emulsifying agents, the main emulsifying agent is preferably about 1 to about 7 weight percent (based on emulsion 12), more preferably about 2 to about 5 weight percent, most preferably Comprises about 2 to about 4 weight percent; Secondary emulsifying agents preferably include, but are not limited to, about 0.5 to about 3 weight percent, more preferably about 0.75 to about 2 weight percent, most preferably about 0.75 to about 1.5 weight percent.

The emulsifying agents described above need to be substantially soluble or miscible with the lipid phase material, especially at the temperature at which the lipid is melted. In addition, emulsifying formulations should have relatively small levels of HLB. Emulsifying formulations suitable for use in the present invention have a typical HLB level of about 2 to about 5 and can be used in combination with different emulsifying formulations. Preferably, the HLB level of the emulsified formulation is about 2.5 to about 3.5.

Preferred emulsifying agents for use in the present invention include silicone polymer emulsifying agents (eg, alkyl dimethicone copolyols (eg, Dow Corning Q2-5200 laurylmethicone copolyol)). Such emulsifying agents are described in detail in U.S. Patent Application Serial No. 08 / 767,120, filed on January 14, 1997, filed by Applicant-L.Mackey (Case 5653C), which is incorporated by reference.

Other suitable emulsifying agents include U.S. Patent Application No. 08 / 336,456 (filed November 9, 1994, Applicant-L.Mackey et al.) And U.S. Patent No. 5,863,663 (Patented Date-). January 26, 1999, Applicant-L. Mackey et al. The emulsifying formulations described above include certain sorbitan esters (preferably sorbitan esters of C16-C22 saturated, unsaturated or branched fatty acids). Due to the way in which they are usually produced, these sorbitan esters usually comprise ester mixtures of mono-, di-, tri- and the like. Representative examples of suitable sorbitan esters include sorbitan monooleate (eg, SPAN 80), sorbitan sesquioleate (eg, Arlacel 83), sorbitan monoisostearate (e.g. CRILL from Croda) 6), sorbitan stearate (for example, SPAN 60), sorbitan trioleate (e.g., SPAN 85), sorbitan tristearate (e.g., SPAN 65) and sorbitan dipalmitate (for example, SPAN 40). Laurylmethicone copolyols are particularly preferred emulsifying agents for use in the present invention. Other suitable emulsifying agents described above include certain glyceryl monoesters [preferably, glyceryl monoesters of C16-C22 saturated, unsaturated or branched fatty acids (eg glyceryl monostearate, glyceryl monopalmi). Tate and glyceryl monobehenate)], and certain sucrose fatty acid esters [preferably sucrose esters of C12-C22 saturated, unsaturated and branched fatty acids (eg sucrose trilaurate and sucrose distearate) (For example, Crodesta F10))], and certain polyglycerol esters of C16-C22 saturated, unsaturated or branched fatty acids (eg, diglycerol monooleate and tetraglycerol monooleate). In addition to these main emulsifying agents, co-emulsifiers can be used to further provide the stability of the aqueous lipid emulsion 12. Suitable co-emulsifying agents include phosphatidyl choline and phosphatidyl choline-containing compositions (eg lecithin); Long-chain C16-C22 fatty acid salts (eg sodium stearate), long-chain C16-C22 di-aliphatic, short-chain C1-C4 di-aliphatic quaternary ammonium salts (eg dietala dimethyl ammonium chloride and dietala dimethyl ammonium methyl) Sulfates; long chain C16-C22 dialcoyl (alkenoyl) -2-hydroxyethyl, short chain C1-C4 di-aliphatic quaternary ammonium salts (e.g., ditaluoyl-2-hydroxyethyl dimethyl ammonium chloride), long chain C16 -C22 di-aliphatic imidazolinium quaternary ammonium salts (eg, methyl-1-talau amidoethyl-2-talau imidazolinium methylsulfate and methyl-1-oleyl amido ethyl-2- Oleyl imidazolinium methylcellulose; short chain C1-C4 di-aliphatic, long chain C16-C22 mono-aliphatic benzyl quaternary ammonium salts (e.g., dimethyl stearyl benzyl ammonium chloride); synthetic phospholipids (e.g., Stearamidopropyl PG-dimonium chloride (phospholipid PTS-Mona Industries, Inc. Contact surface tension modifiers, such as cetyl and stearyl alcohol, may be included for closer packing at the water-lipid contact surface.

Other emulsifying agents useful in preparing the products of the present invention include U.S. Patent Application No. 08 / 759,547 (filed date-December 5, 1996; Applicant-L. Mackey and B. High viscosity emulsifying agents described in Hird). The viscosity of this emulsified formulation is preferably at least about 500 centipoise at 55 ° C. (viscosity can be measured using a Lab-Line Instruments Brookfield-type rotating disc viscometer). In particular, in this application, (i) hydrocarbyl-substituted carboxylic acids or anhydrides (preferably polyisobutylene-substituted succinic acids or anhydrides) and (ii) esters or amine products formed by reacting amines or alcohols, The use of an emulsifying agent named OS-122102, OS-121863, OS-121864, OS-80541J and OS-80691J (Lubrizol Cor., Wycliffe, Ohio) is described. Such materials and methods for their preparation are disclosed in U.S. Patent No. 4,708,753 (Patent Date-November 24, 1987; Patent Holder-Forsberg; lines 32-38 of column 3, line 10 of column 8). To column 68 of column 26) and 4,844,756 (Patent Date-July 4, 1989; Patent Holder-Forsberg).

Other materials believed to be useful in the present invention include hydrocarbon-substituted succinic anhydrides described in the following documents: US Pat. No. 3,215,707 (Patent Date-1 November 2965; Patent Owner-Rense), No. 3,231,587 (Patent Date-January 25, 1996; Patent Holder-Rense), 5,047,175 (Patent Date-September 10, 1991; Patent Holder-Forsberg), WO87 / 03613 (Publication Date-June 1987) 18; Applicant-Forsberg). All of these documents are incorporated by reference.

Another material useful as an emulsifying agent, in particular as a co-emulsifying agent with high viscosity main emulsifying agents, is an ABA block copolymer of 12-hydroxystearic acid and polyethylene oxide. Such materials are described in US Pat. No. 4,875,927 (Patent Date-October 24, 1989; Patent Holder-T.Tadros), which is incorporated by reference. A representative material of useful emulsifying formulations described in this document is Arlacel P135 (Imperial Chemical Industries PLC).

All of the above materials may be used as a single emulsifying agent, but it may be desirable to use one or more emulsifying agents in forming the emulsion (12). In particular, when a high viscosity emulsifying formulation is used, it may have some "tacky" feel when shear pressure is applied upon use of the treated product to break up the emulsion 12. In such cases, it may be desirable to use relatively small viscosity co-emulsifying formulations with the main emulsifying formulation, thereby reducing this sticky feeling by reducing the amount of the main emulsifying formulation used. . In one preferred embodiment of the invention, the major emulsifying agents commercially available from Lubrizol (ie, reaction products of polyisobutylene-substituted succinic acid and amines) and poly-12-hydroxystearic acid and polyethylene oxide (eg, By using a secondary emulsifying formulation, which is an ABA block copolymer of ICI Arlacel P135), the moisture content is improved over time and the stickiness (through reduction in the amount of the major emulsifying formulation) is reduced. It will be known to those skilled in the art whether a plurality of emulsifying agents are suitable, in which case a suitable relative amount of each emulsifying agent depends on the end use. Such a determination will be made only through routine testing by one skilled in the art in accordance with the disclosure herein.

4. Optional Emulsion Ingredients

In addition, the high internal phase inverse emulsion 12 of the present invention may include other optional ingredients that are conventionally present in this type of moisture-containing solution. Such optional components may be present in the continuous lipid phase or internal superfine, and may be perfumes, antimicrobial actives (eg, antimicrobial actives), pharmaceutical activators, odorants, opacifying agents, astringents, skin wetting agents, and the like, and mixtures thereof. This includes. Such materials are well known in the art as additives used in the formulations and can be used in effective and suitable amounts in the emulsion 12 of the present invention. A particularly preferred optional ingredient included in the emulsion 12 of the wet type cleansing wipes product 8 according to the invention is glycerin as a skin conditioning agent.

The emulsion component 12 of the product of the present invention is described and claimed in the components and amounts present after emulsion formation. That is, when a stable emulsion 12 is formed and administered to the carrier. It is understood that the description of the emulsion 12 (component and amount) includes the emulsion 12 formed by combining the described components and amounts, regardless of the chemical composition of the components after emulsification and administration with a carrier.

C. Other Optional Product Ingredients

In addition to the high internal phase inverse emulsion 12, there are typically any other ingredients that may be included in the product of the present invention to improve the cleaning performance of the product of the present invention upon release of the emulsion 12. Certain of these optional components may not be present in significant amounts (eg, more than 2% of the internal phase) because they can cause the emulsion 12 to break prematurely. Such components include various anionic detergent surfactants having relatively high HLB levels (eg, HLB levels of about 10 to about 25), such as sodium linear alkylbenzene sulfonate (LAS) or alkyl ethoxy sulfate (AES). ; Non-ionic detergent surfactants (eg, alkyl ethoxylates, alkyl amine oxides, alkyl polyglycosides); Zwitterionic detergent surfactants; Amphoteric detergent surfactants; And cationic detergent surfactants (eg, cetyl trimethyl ammonium salts and lauryl trimethyl ammonium salts). See, US Patent No. 4,597,898 (Vander Meer; Patent Publication-July 1, 1986) —Columns 12 to 16 (representative anionic, non-ionic, zwitterionic, zwitterionic and cationic detergent surfactants)}. Alternatively, such high HLB detergent surfactants may be administered or included separately from the emulsion 12 in the product of the present invention. For example, before or after the emulsion 12 is administered to the carrier, the aqueous solution of the high HLB detergent surfactant described above can be administered to the carrier. During wiping, the emulsion 12 may break, releasing superfine ingredients and blending with high HLB detergent surfactants to enhance hard surface cleaning.

While the description of the products of the present invention generally relates to the administration of a single aqueous lipid emulsion 12 to the carrier, two or more different emulsions 12 may be used in the manufacture of a single product. In such a case, there may be a difference in various aspects, including the ratio of the inner superphase and the external lipid phase, the emulsifying agent used, the components used in the inner phase and the lipid phase, and the like. It may be desirable to use several emulsions 12 in one product when two or more components are available in parallel with each other, but each of the two or more components may be included in a separate emulsion 12. Alternatively, if a particular reaction in use is desired, the reactants may be provided in a separate emulsion (12). If the emulsion 12 is sheared during use, the desired reaction occurs. For example, if foaming is desired during wiping, mild acid may be added to the inner pole of one emulsion 12, with bicarbonate being placed on the inner pole of the second emulsion 12. Add. If the emulsion 12 is sheared during use, the reactants interact with each other to produce the desired foam.

Suitable emulsions 12 described above are also described in WO96 / 14835 (published-May 23, 1996; Applicant-Mackey et al.) And WO96 / 21505 (published-July 18, 1996; Applicant-DesMarais et al.) have.

Pattern

As noted above, it is preferred to administer the functional additives described above to the substrate 10 in a discontinuous pattern. As noted above, in a discontinuous pattern, the emulsion 12 has a separate site separate from the substrate site 14 without emulsion. Suitable discontinuous patterns include discrete island regions of the emulsion 12, essentially continuous networks, discrete macropatterns, and preferably discrete stripes that are distributed in a semi-continuous pattern. stripe). The stripes are preferably continuous as shown, but may comprise a discrete segment pattern that collectively includes the stripes. When stripes are selected, it is desirable to orient the stripes in the machine direction to facilitate manufacture.

All means well known in the art (eg Gravure printing, flexoprinting, spraying and preferably injection molding) can be used to dispense and distribute the emulsion 12 onto the substrate 10. More preferably, the emulsion 12 is shaped as a series of continuous cylindrical beads. Continuous cylindrical shapes are preferred because such shapes reduce the ratio of surface area: volume of the emulsion 12.

The stripes of the functional additive may be straight, sinusoidally shaped, wave shaped, or the like. In the case of selecting a wave-shaped stripe, the stripe is preferably in phase so that parallelism is maintained and each strip keeps the same distance from adjacent strips.

It is preferred that the emulsion 12 have a minimum surface area: volume ratio. Minimizing the surface area: volume ratio reduces the water loss from the emulsion 12 due to evaporation. The surface area: volume ratio of the emulsion 12 is preferably 4 / unit length or less, more preferably 3 / unit length or less, and most preferably 2 / unit length {wherein the unit length is an emulsion (12 Measured in the cross-section). In the case of a cylindrical bead shaped emulsion 12, a suitable surface area: volume ratio is 40 to 200 inches ^-1 , preferably 75 to 125 inches ^-1 .

However, for example, providing the user with a single, unitary sphere of emulsion 12 may not yield optimal results. However, the distribution of moisture is very local and may not be adequately spread throughout the surface of the wipe product 8. Due to the distribution of the emulsion 12 or in particular the moisture released therefrom, it is desirable to have a similar feeling of water spraying on the skin.

As the basis weight and absorbency of the substrate 10 increase, it is well known to those skilled in the art that the amount of moisture required to locally saturate the substrate increases. Thus, as the basis weight and / or absorbency of the substrate 10 increases, the amount of emulsion 12 administered to the substrate should increase in proportion to it.

The emulsion is distributed in the surface area of the wipe product 8, preferably 5 to 35%, more preferably 10 to 25%. If the emulsion 12 breaks, the emulsion 12 locally wets the corresponding substrate 10 site. This wetted substrate site may be 10 to 90% of the surface area of the substrate 10 and is balanced with the surface of the substrate being kept dry due to the discontinuous pattern.

It is clear that the proportion of the surface area to be wetted is greater than the proportion of the surface area initially coated by the emulsion 12. In addition, due to the passage of time and / or the use of the wiping product 8, the whole wiping product 8 may get wet.

Therefore, it is desirable to administer the emulsion beads to the substrate 10 in a configuration that matches the diameter and pitch of the emulsion 12 beads in a preferred geometric form. The amount of moisture delivered by the emulsion 12 increases in proportion to the square of the diameter of the beads. Thus, as the diameter of the beads increases, the pitch between adjacent stripes of the emulsion 12 increases. The pitch between adjacent beads of emulsion 12 is suitably between 0.030 and 1.500 inches, preferably between 0.175 and 0.375 inches.

If the emulsion 12 is directly exposed to the surface (ie, the emulsion 12 is distributed outside of the substrate 10 when the wipe product 8 is provided to the user), the emulsion 12 is preferably Comprises at least 25%, more preferably at least 50%, most preferably at least 75% (based on basis weight of the substrate). Or, if the emulsion 12 is distributed between two layers of the substrate 10 under a laminate structure for tissues, the emulsion 12 is preferably at least 150%, more preferably at least 200%, most preferably At least 250% (based on the combined basis weight of the two layers). In such laminate structures used for hard surface cleaning, the emulsion 12 preferably comprises at least 500%, more preferably at least 650%, most preferably at least 800% (based on the bond basis weight of the two layers). .

By "basis weight" described herein is meant the overall basis weight of the substrate 10 as the mean value of the sites of the different basis weights contained in the substrate 10. The basis weight of the substrate 10 can be measured according to ASTM test method D3776-9 (this test method is incorporated herein by reference) and the measurement results are described as "pounds / 3000 feet square". If the basis weight of the substrate 10 is known as the tare, the weight of the emulsion 12 can be measured via a hydrometer.

If desired, the site 14 of the substrate 10 without emulsion 12 is cross-linked at the distal end of the wipe product 8 compared to the corresponding site 14 distributed inside the wipe product 8. A little wider in the machine direction. This structure processes and slits the wide, multi-roll area web of the wipe product 8 into a narrower discrete unit for transportation and sale to the user. It will be apparent to those skilled in the art that the non-substrate region 14 may be formed wider at other regions of the wipe product 8. This geometrical arrangement can be easily achieved by not introducing the emulsion 12 continuously. Instead, the emulsion 12 can be introduced intermittently in the machine direction. Substrate 10 is cut or perforated in a cross-machine direction consistent with region 14 free of emulsion 12 to produce a discrete or separated wipe product 8.

Referring to FIG. 2, emulsion 12 may define a decorative representation, such as a macropattern. Such macropatterns may be used as described above or added on emulsion 12 of discontinuous striated patterns. The macropattern of emulsion 12 has the advantage that local moisture can be imposed from a pattern that can give the user an aesthetically pleasing visual cue. The macropattern of the emulsion 12 may form a decorative indicia. Such decorative markings may be provided in the form of flowers, butterflies, clouds, trade names, advertisements or any other visually recognizable flat pattern.

In a preferred embodiment, the substrate 10 may comprise a multi-basis weight tissue. Multi-weight substrates 10 can be prepared according to the patents described above, which are incorporated herein by reference. The multi-basis substrate 10 provides the advantage that the excess moisture makes it easier to saturate the areas where the basis weight is small, making it easier to apply to the surface. Preferably, the multi-weighing substrate 10 comprises essentially continuous large basis weight network portions, with discrete discrete basis weight portions distributed essentially throughout the continuous network.

Alternatively, a substrate 10 having a semi-continuous pattern of large basis weight and small basis weight can be selected. In a less preferred embodiment, in the case of abandoning the strength of the substrate 10 described above, a substrate 10 having a basically continuous small basis weight portion in which discrete large basis weight portions are distributed is used. Can be. This substrate 10 provides the advantage that moisture is more readily released from the emulsion 12 and passed through the substrate 10 to the surface due to the continuous small basis weight of the sites.

When selecting a substrate 10 having essentially large areas of continuous basis weight, the pitch of the discrete small basis weight portions described above is preferably smaller than the pitch between adjacent stripes of the emulsion 12. Due to this relative difference in pitch, as described above, the emulsion 12 blocks the small basis weight portion described above and is easily transferred between them.

When used for tissue applications, substrates 10 having a basis weight of 7 to 10 pounds / 3000 ft ² and a discrete small basis weight portion of 50 to 300 (more preferably 100 to 200) / inch ² per layer are suitable. . When used for cleaning hard surfaces, substrates 10 having a basis weight of 20 pounds / 3000 ft ² and discrete small basis weight portions of 100 to 200 / inch ² are suitable.

In a preferred embodiment, the wipe product (8) is disclosed in US Patent Application No. 08 / 886,764, which is incorporated by reference, in "Cleaning Articles Comprising a Cellulosic Fibrous Structure Having Discrete Basis Weight Regions Treated with A High Internal Phase Inverse Emulsion", filed -July 1, 1997-Applicant-Nicholas J. Nissing et al.

When selecting substrates 10 having semi-continuous basis weight patterns, such substrates 10 are disclosed in U.S. Patent No. 5,628,876 (Patent Date-May 13, 1997; Patent Holder-Ayers et al. It can be prepared according to the). Preferably, the semi-continuous pattern is oriented in the machine direction. When choosing such a geometrical arrangement, emulsion (12) beads are introduced into the semi-continuously patterned substrate (10) described above so that emulsion (12) is aligned (preferably with a small basis weight portion of substrate (10) Is matched). The advantage of this structure is that, as described above, the water released from the emulsion 12 moves more easily through the small basis weight portion of the semi-continuously patterned substrate 10 described above. When parallel to the machine direction, the small basis weight portion of the semi-continuous pattern described above can be disposed below the stripes of the emulsion 12 on the pitch.

It will be apparent to those skilled in the art that there may be many variations within the scope of the claimed invention of the present invention. For example, a laminate structure comprising an emulsion 12 distributed between two layers of substrate 10 can be prepared as described above. However, the above layers do not necessarily need to be identical. One ply may be nonwoven to increase strength. The other layer may be a tissue for delivering moisture to the surface. If desired, the non-woven layer described above is treated to be hydrophobic, thereby allowing moisture released from the emulsion 12 to migrate through the tissue layer to the surface. If desired, the layers can be joined using a separate adhesive material other than the functional additives described above.

It is possible to choose a laminate comprising two tissue layers. One layer may have a multi-weight area pattern as described above. Such multi-basis sites may comprise a semi-continuous pattern. The other layer may comprise a single basis weight site for strength. In this embodiment, more moisture can be transferred through one layer than through the other layer. In contrast, this multi-basis site layer comprises a essentially continuous network of large basis weight sites, with discrete small basis weight areas distributed therein.

In another embodiment, laminates having multiple laminae may be provided. The thin layer may alternately include a substrate layer 10 and an emulsion layer 12. Such a laminate may comprise two substrates 10 facing outward, as described above. Emulsion 12 may be contained entirely in the laminate. Alternatively, emulsion 12 may be distributed on one exposed surface of this laminate.

Referring to FIG. 3, the emulsion stripes in another embodiment may include a discrete sphere shaped emulsion 12. These spherical discrete emulsions 12 are arranged side by side to form a discontinuous pattern as a whole. The advantage of this structure is that it has a suitable surface area: volume ratio, like the generally cylindrical beads described above. Although stripes are shown in FIG. 3, those skilled in the art will appreciate that discrete spherical emulsions 12 may be placed side by side to form all desired non-continuous patterns.

Another variation, which is shown in FIG. 3 but is also applicable to all of the embodiments described above, is to vary the amount of emulsion 12 in the discontinuous pattern described above. For example, certain emulsion stripes may have relatively more emulsion 12 than other stripes. Due to this structure, it is possible to impose more moisture locally on the surface, but to provide a relatively dry end to minimize the amount of moisture remaining on the surface.

Depending on the intended use, the wipe product 8 may be provided in discrete units, or may be combined continuously via perforation or the like. The wipe product 8 can be used individually, as in facial tissues (see FIG. 6). For individual use, wiping products are described in US Pat. No. 4,623,074 (Patent Date-1 November 8986; Dearwester), 5,520,308 (Patent Date-May 28, 1996; Patent Holder-Berg .Jr. Et al.) And 5,516,001 (Patent Date-May 14, 1996; Patentee-Muckenfuhs et al.). Alternatively, the wipe product 8 may be in the core-wound form described in US Pat. No. 5,318,235 (Patent Date-1 June 7, 1994; Patent Holder-Sato) (FIGS. 5 and 7). Reference). If desired, if care is taken not to destroy the emulsion 12, the wipe product 8 may be packaged by light compression. Such packaging may be as described in US Pat. No. 5,664,897 (Patent Date-July 8, 1997; Patent-Young et al.).

According to the invention, the sheets overlap in roll form (FIG. 5) or in stack form (FIG. 6) such that the first portions of the sheets adjacent to each other are offset from each other. Preferably, for all pairs of sheets adjacent to each other, the sheets overlap essentially so that the first portion of one sheet corresponds to each other in the Z direction with the second portion of the other sheet. In FIG. 6A, the two-layer sheet 20a has a first portion therein with the functional additive 12a, and the adjacent two-layer sheet 20b has a first portion with the functional additive 12b therein. Have a site. The term "Z direction" herein is perpendicular to the tangential line passing through a general plane of the sheet 20 (in the case of individual sheet stacks, as shown in FIG. 6) or a predetermined point around a given roll product. It means the direction of phosphorus. In the case of a roll product, it will be apparent to those skilled in the art that the radius of the roll and the Z direction are parallel to each other connecting the imaginary rotational axis of the roll and a predetermined peripheral point. "Machine direction" is designated as "MD" and "Cross-machine direction" is designated as "CD". "Machine direction" herein means a direction parallel to the advancing direction of the substrate passing through the papermaking apparatus. In the case of a roll product, the machine direction follows a plurality of sheet shapes including the rolls and includes substantially spirals parallel to the plurality of sheets including the rolls. The term "cross-machine direction", designated as "CD", is a direction perpendicular to the machine direction and parallel to the substrate. For roll products, the traversing machine direction is parallel to the imaginary axis of rotation of the roll product ("X" in FIG. 5).

Basically, in all adjacent pairs of sheets, the first portion of one sheet should substantially correspond to the second portion of the other sheet in the Z direction, at least about 70% of the protruding portions of the functional additive of one sheet. Means that they correspond to each other in the Z direction with respect to the second portion of the adjacent sheet. For example, in FIG. 6A, assuming that the illustrated functional additive sites 12a and 12b are substantially parallel (see FIG. 6), about 100% of the protruding sites 12a of the functional additive are second to the adjacent sheet. Correspond to each other with site 20b. In FIG. 6A, the dimension W of the functional additive portion 12a represents the width of the protruding portion 12a of the functional additive. Thus, in a preferred embodiment, the functional additive 12 disposed on or within each sheet is basically supported by the substrate 10 and supported by the stripes of the functional additive 12 connected with the sheets placed side by side. It doesn't happen. Such a structure is understood to prevent the streaks of the functional additive 12 from being damaged, especially when external forces are applied to the wipe product (eg during winding or packaging). In the case of roll products, radial forces can be applied under various circumstances (eg, in use such as winding, packaging, transportation and user use). Since the functional additive can be disposed between two adjacent layers in a substrate comprising a multilayer structure, the functional additive is said to be disposed on top or inside (on or in) of the sheet (see FIG. 6A). The term "essentially" in "any pair of the mutually adjacent sheets" means that some of the adjacent sheets will often have a first site "stack" on top of each other. That means you can. This occurs because the first portions of the layers adjacent to each other in the roll product often cross-over, depending on the flexibility the roll product originally possesses and / or the relative length of the substrate in the roll product and the oscillation period of the stripes. Can be. It is not desirable for this to occur, and for roll products, the vibration period of the stripes is preferably chosen to minimize the rate of strip redundancy.

It is advantageous to increase the liquid-containing properties of the product by off-setting the site of the functional additive 12 in the sheets arranged side by side. In the table below, for "Day-Seven Water Loss", it is 25.5% for products having a non-offset first portion, while in the product of the present invention having an offset first portion, 16.2 to Decreased to 17.7%. The moisture loss test described above is described below.

It is also contemplated that the first portions of the sheets arranged side by side with the functional additives off-set according to the invention have the advantage of reducing the compressibility of the rolls. The term "compressibility" of a roll herein refers to the firmness or non-susceptibility of the roll to compression under external influences (especially radial forces). The compressibility of the roll can be measured according to the following test method. When the compressibility of a roll is large, it is thought that it is fatal to the reliability of the packaging apparatus used for packaging a rolled product. Typically, it is advantageous for the compressibility of the roll to be less than about 6%. The table below shows that the roll compressibility of the articles of the invention is sufficiently small compared to rolls with non-offset strips of functional additives.

According to one preferred embodiment of the present invention comprising a roll product, the functional additive stripes 12 and the machine direction MD form an acute angle [lambda] (see FIG. 4). In particular, when the stripes reciprocate or pulsate along the length of the substrate comprising the roll (see FIG. 4), the acute angle λ may vary along the stripes of the functional additive 12. Thus, in the case of "sinosoidal" shaped stripes, the acute angle lambda gradually changes, for example from + 1 ° to 0 °, -1 °, etc., as those skilled in the art can readily understand. The maximum acute angle (λ) is preferably from about 0.1 to about 10.0 °, more preferably from about 0.1 to about 2.0 °, most preferably from about 0.1 to about 1.5 °. In Fig. 4, the symbol " A " represents the amplitude of the striated stripe 12, and the symbol " F " represents the phase (one round trip). The amplitude A is preferably at least half, more preferably at least the same, and most preferably at least twice, the width or diameter (if available) of the stripes 12. In other embodiments (not shown), the strip and machine direction may form a constant constant angle (λ).

In addition, although the functional additive stripe 12 is parallel to a machine direction, it may be distributed alternately in a roll product. For example, in FIG. 4A, the strips 12 are discrete and indented at predetermined intervals (unlike a progressive wave as shown in FIG. 4). It is preferable that the length L of the space | interval is below the length of the roll periphery formed by the sheet | seat part 20 which a part has strip having length L. In the embodiment of FIG. 4A, the gap length L is preferably varied along the length of the substrate, which reflects the change in roll diameter (and corresponding length around the roll) as the roll product is formed.

The roll product embodiments described above can be made via a process comprising the following steps:

Providing a substrate 10 having a machine direction (MD) and a cross-machine direction (CD);

Providing a functional additive (12);

The functional additive 12 is accumulated on the substrate 10 in a pre-selected pattern to form a plurality of first substrate portions coated with the functional additive and a plurality of second substrate portions free of functional additives. Doing; And

Winding the substrate with the functional additive 12 into the roll product 8 such that the first portions of all two mutually adjacent layers of the roll product 8 are off-set to each other.

Referring to FIG. 7, showing an example of a process according to the invention, the substrate 10 comprises a laminate formed of two layers 10a and 10b. Both layers 10a and 10b are conveyed in the machine direction. Optionally, glue can be administered to one of the two layers 10a and 10b via a glue applicator 40 to bind the layers 10a and 10b to each other. Alternatively, the functional additives can be used to bond the layers together without using additional adhesive. During this process, functional additive dispenser 50 is used to accumulate functional additive 12 in layer 10a. Preferably, the functional additive dispenser 50 has a structure capable of providing a plurality of individual striped functional additives, and may include a molding apparatus. In general, patent applications 09 / 258,498, 09 / 258,511 and 09 / 258,497 (file date—February 26, 1999) are incorporated by reference. For example, one of the preferred molding devices is DuraFiber 15-20 Pressure Fed Manifold (commercially available from J & M Laboratories, GA 30534 Dawsonville).

As layer 10a moves in the machine direction (MD), the functional additive injector 50 moves in the cross-machine direction (CD), preferably in the reverse direction. The functional additive stripes 12 accumulated on layer 10a have a wave or “signal curve” shape defined by the speed of the web and the amplitude and speed of the functional additive dispenser 50.

At this time, the layers 10a and 10b are bonded to each other in the bonding roll 60 such that the functional additive 12 is located between the two layers 10a and 10b. In addition, the laminate may be perforated by the perforator 70, may be cut into individual sheets by the cutter 80, and wound into a roll 8, as is well known in the art.

Alternatively or in addition thereto, the substrate with the functional additive may be reversed in the cross-machine direction (CD) prior to winding or during winding. This can be done, for example, using the web-adjusting device 90 of FIG. 8. The web-regulating device 90 includes one or more rolls that are distributed in the transverse direction as compared to the machine direction movement of the substrate. In FIG. 8, the web-adjusting device comprises two parallel rolls 91 and 92. The rolls 91 and 92 support the web moving in the machine direction MD. As seen in the general plane of the moving substrate described above, the rolls 91 and 92 are slightly rotated relative to the machine direction so that the axial and trans-machine directions of the rolls 91 and 92 form an acute angle, thereby slightly shifting the direction of movement of the substrate I can change it. Thus, after the functional additive 12 accumulates on / in the substrate and before the substrate 10 is rolled up in roll form, the rolls 91, 92 are rotated (preferably vice versa) in the general plane of the substrate. Rotation) to alternately form the functional additive stripes 12 while winding the substrate 10 in the form of a roll. In FIG. 8, the rolls 91 and 92 rotate in the plane of the substrate 10 so that an angle α is formed between the rotation axis AX3 of the roll 91 and the cross-machine direction CD. Due to this, the substrate 10 gradually moves in the cross-machine direction CD so that the imaginary centerline of the sheet is moved from AX1 to AX2. This same movement occurs even when the rolls 91 and 92 rotate in opposite directions (not shown) with respect to the general plane of the substrate 10. The spacing between the ultimate positions of AX1 and AX2 forms the degree of cross-machine direction alternation of the substrate 10 with the functional additive 12 stripes on or within it. One example of a commercially available web-adjusting device 90 includes a web displacement guide, also referred to as an "Offset Pivot Guide" (FIFE Corporation, Oklahoma City, Oklahoma).

6 shows another embodiment of the article 8 of the invention, including the individual sheet 20 stacks. Each sheet 20 of the stack, which is a preferred embodiment, comprises two layers 10a, 10b (see FIG. 6A), but a sheet 20 comprising a single layer structure is also included in the present invention. The functional additive 12 is distributed throughout the substrate 10 so that in all pairs of sheets adjacent to each other, the first portion of one sheet is offset relative to the first portion of the other sheet. In all adjacent pairs of sheets, the first portion of one sheet substantially coincides with the second portion of the other sheet. Thus, the functional additive 12 of one sheet is supported by the substrate 10 of the adjacent sheet.

Test method:

Moisture Loss Measurement Test

The sample is cut in a roll product having a functional additive (eg an emulsion). The cutting of the sample should be made up of twenty sheets that are superimposed in succession in a manner opposite to each other, each sheet containing a functional additive on or within it. The sample is 4.5 inches wide (standard roll width of the product in the United States) and is 10 inches long. The sample must be carefully cut on the cutting board so that the emulsion is not damaged. The beaker is weighed in two digits (two significant figures after the decimal point) and weighed and recorded. The sample is then loosely wound in the machine direction so that the sheet-overlap includes about one third of the sample length. The sample is then placed in a beaker and the weight of the beaker containing the sample is recorded. Then, after 7 days, the beaker and the sample are weighed. The reduced weight is thought of as the aqueous phase of the emulsion. This is determined by calculating the ratio of the lost aqueous phase to the amount of the original aqueous phase of the roll product. The initial amount of the aqueous phase in the emulsion is determined by subtracting the amount of substrate comprising the sample from the weight of the total sample and then multiplying the result by the ratio of the weight of the aqueous phase in the initially accumulated emulsion.

Roll compressibility test

The roll product is placed on a Roll Diameter Tester comprising a longitudinal stand with a transverse core support. The roll product is positioned on the roll core support such that the end of the roll product is flush with the longitudinal stand of the test apparatus. The perforated end of the tail sheet (the last sheet of roll product) should end at the top of the roll product and preferably face the analyzer. At this time, a diameter tape can be used. When the diameter tape wraps around the roll product, the diameter tape has a measurement mark indicating the diameter of the roll product. 100 grams of weight is added to the free end of the tape. The diameter tape is wrapped around the center of the roll so that a true circle is formed by the tape, and the weighted ends of the tape hang freely. After 3 seconds, record what was read closest to 0.01 inch (0.1 mm).

The above-mentioned diameter tape is positioned as is and an additional 1000 gram weight (total weight 1100 grams) is added on the end of the tape to measure compressibility. After 3 seconds, record the reading closest to 0.01 inch (0.1 mm). The tightness of the roll was then calculated as the compressibility (% compressibility) according to the following formula to obtain the closest to 0.1%:

Compressibility (%) = × 100

[table]

Round trip cycle (vibration / substrate ft) Roll Diameter (RD) (in) Compressed RD (in) Roll compressibility (%) 7-day moisture loss rate (%) 0 5.02 4.71 6.14 25.5 0.069 5.05 4.78 5.35 17.7 0.138 5.02 4.76 5.26 16.2 0.207 5.02 4.67 6.98 17.2

Without being bound by theory, the relatively large roll compressibility (6.98) in the final measurement of the table is described as an undesirable oscillation period, resulting in a large number of cross-overs of functional additive stripes. I think.

The term “oscillation frequency” herein refers to the relative amount of one complete round trip of the functional additive stripes per foot of substrate. For example, for a reciprocating period of 0.069, 14.5 feet of substrate are moved during one complete cycle of the functional additive stripes. The reciprocating period is a number that can be scaled at the machine direction speed of the substrate and the absolute period of the device (e.g., measured in reciprocation per second) is measured at the machine direction speed of the substrate (measured in feet per second). It can be determined by dividing. Roll diameter (RD) was typically measured as described in the test methods herein.

Claims (10)

A plurality of single-use sheets, preferably stacked in series, facing each other, preferably comprising rolls or stacks of sheets, Each sheet comprises a substrate; And a functional additive, extending from the substrate and distributed in a discontinuous pattern on the substrate, wherein the substrate has a first portion coated with the functional additive and a second portion free of the functional additive; The sheets are overlapped such that the first portions of the sheets adjacent to each other are off-set to each other, preferably the first portions of one sheet substantially correspond to the second portions of the other sheet. bedsheet. The sheet according to claim 1, wherein the functional additive is distributed in a pattern comprising stripes, wherein the stripes are preferably generally parallel and more preferably generally have a cylindrical shape. The method of claim 1, wherein the substrate is a cellulose structure (preferably through air-dried paper, more preferably differential density paper); The functional additive is a group consisting of emollients, emulsions, emollients, lotions, topical drugs, soaps, anti-microbial and antimicrobial agents, wetting agents, coatings, inks and dyes, strength additives, absorption additives, binders, opacifying agents, fillers and combinations thereof. Sheet (preferably, the functional additive comprises an emulsion and a liquid contained therein). A wipe product comprising a substrate and a functional additive on the substrate, The wipe product has a machine direction and a cross-machine direction perpendicular thereto; The functional additive is distributed on the substrate in stripes of a discontinuous pattern, generally having a cylindrical shape; Preferably, the stripes and the machine direction form an acute angle with each other; More preferably, the stripes have a wave form such that the substrate has a first portion coated with the functional additive and a second portion free of the functional additive; And when the wipe product is rolled into a roll having a rotation axis parallel to the cross-machine direction, the stripes of basically two adjacent layers of the wipe product are offset in the cross-machine direction with respect to each other. The method according to claim 1, 2, 3 and 4, The acute angle described above is about 0.1 to about 10 ° (preferably about 0.1 to about 2 °, more preferably about 0.1 to about 1.5 °). The method according to claim 1, 2, 3, 4 and 5, The functional additive described above comprises a pattern of deposits dispersed on the substrate that are placed side by side to form stripes. According to claim 1, 2, 3, 4, 5 and 6, And said substrate comprises a laminate formed by two or more layers, said functional additive being located between said two or more layers. A method of making a wipe product comprising the following steps: Providing a substrate having a machine direction and a cross-machine direction perpendicular thereto; Providing a functional additive; By accumulating the functional additive on the substrate in a pre-selected pattern, the plurality of first portions of the substrate coated with the functional additive and the plurality of second portions of the substrate free of the functional additive. Forming a site; And Winding the substrate with the above functional additive on a roll so that the first portions of the two adjacent layers are offset from each other. The method of claim 8 wherein the step of accumulating functional additives on the substrate, Moving one of the substrates and the functional additives relative to the other at least in the machine direction; And Accumulating the functional additive on the substrate in a plurality of stripes, wherein the stripes and the machine direction form an acute angle with each other, Preferably, the method comprises moving the substrate in the machine direction and moving the emulsion in the cross-machine direction to form a plurality of functional additive stripes having a wave shape. 10. The method of claim 8 and 9, further comprising the step of moving the substrate having the functional additive distributed thereon in the cross-machine direction such that the plurality of first sites alternately appear in the cross-machine direction. Characterized in that the method.